A short explanation

"3D Touch
Let's get to the good stuff: 3D Touch. It exists, it's here, and it works. Everything we reported on back in 2014 was spot on. There are Live Tiles that 'explode', and you can interact with the phone merely by hovering your hand over it.

3D Touch works with various sensors in the display and even on the sides of the McLaren. As your finger approaches the screen all the Tiles begin to move in a wave-like fashion as visual feedback. Hovering above the Internet Explorer and Phone reveal the 'exploding' Live Tile MixView feature. The concept here was to give developers freedom to show more information on the Live Tile. Instead of just two sides, you could have up to eight smaller tiles. When you hover, the Tile explodes and moves to the center of the display where you can act on the smaller tiles. It is a little awkward, but it works."